IGC Car collector achievements

So, I worked out which cars you cannot get using in game cash, which are required for the collector (1-10 cars) achievement.

Is there any work around to get 10 of any of these car achievements?

I posted the achievements as reference

Alfa Romeo Collector
Bently Collector
Cadillac Collector
Caterham Collector
Chrysler Collector
Ford Shelby Collector
Hummer Collector
Infiniti Collector
Jaguar Collector
Jeep Collector
Koenigsegg Collector
Lancia Collector
Marussia Collector
Mclaren Collector
Mercedes-Benz Collector
Pagani Collector
Renault Collector
Scion Collector
Vauxhall Collector

This list is incorrect. I've gotten the Lancia, Renault and, Infiniti done through IGC.

Well sure currently, but they have been available for IGC and are in rotations, so it's possible. It was only a few months ago I got the Lancia and Renault. They will eventually come back around in IGC rotation.

maybe in 2014 they will be for IGC again yeah ..
it's so dumb they made rotation change every 2 weeks :s

lol they just added 2 new cars to igc it takes to ea get 2 new cars about year

You can complete Bentley achivemente now

Ford Shelby can complete last week